First post on here, but i'm honesty at my wits end! I installed four Lutron in-line dimmers about 9 months ago, all on the same new lighting circuit. Last week the client rang to say that there had been a power cut locally, and when the power was restored, all his Lutron dimmed circuits were flickering, badly.
I attended today, and they are flickering, and this is worse when dimmed. I broke the circuit down and it's good. I checked the supply characteristics and they're good. I changed the main switch and RCBO and they're good. With all other circuits in the house, all the connected dimmed loads flicker.
Finally, I made a test rig with one of the affected dimmers and placed this on a plug top. It still flickers on any socket circuit. The next door neighbour even kindly allowed us to try his sockets, and it still flickers.
I took it home to mine and it's perfect. I tried it in an property on the next street along, and it's perfect smooth dimming.
I spoke to the manufacturer an the NICEIC and they both said speak to the DNO, possible harmonics issue.
The DNO have just been out, done and EFL test and said nothing more they can do or check! The client mentioned possible harmonics issue, but the DNO lad said the supply was good.
The loads are 2 circuits of 10 x 10w 350ma LED lamps (Trailing edge dimmable), 1 x 30w 12v LED driver, and 1 x 10W LED Pendant lamp, all have been working flawlessly up until this power cut. I immediately thought they must have been damaged by a surge, but I can prove they're good at my property and others!?!
Any advice on where to go from here would be massively appreciated.
Thanks in advance.
I attended today, and they are flickering, and this is worse when dimmed. I broke the circuit down and it's good. I checked the supply characteristics and they're good. I changed the main switch and RCBO and they're good. With all other circuits in the house, all the connected dimmed loads flicker.
Finally, I made a test rig with one of the affected dimmers and placed this on a plug top. It still flickers on any socket circuit. The next door neighbour even kindly allowed us to try his sockets, and it still flickers.
I took it home to mine and it's perfect. I tried it in an property on the next street along, and it's perfect smooth dimming.
I spoke to the manufacturer an the NICEIC and they both said speak to the DNO, possible harmonics issue.
The DNO have just been out, done and EFL test and said nothing more they can do or check! The client mentioned possible harmonics issue, but the DNO lad said the supply was good.
The loads are 2 circuits of 10 x 10w 350ma LED lamps (Trailing edge dimmable), 1 x 30w 12v LED driver, and 1 x 10W LED Pendant lamp, all have been working flawlessly up until this power cut. I immediately thought they must have been damaged by a surge, but I can prove they're good at my property and others!?!
Any advice on where to go from here would be massively appreciated.
Thanks in advance.